Thread cutting mechanism



Nov. 3, 1931. A. A. GORDON THREAD CUTTING MECHANISM Filed Jan. 23, 1931 3 Sheets-Shae). l

193-1- A. A. GORDON 1,830,271

THREAD CUTTING MECHANI SM Filed Jan. 23, 1931 5 S2s-Sheet 2 JW M Nov. 3, 1931. A. A. GORDON 1,330,271

THR EAD CUTTING MECHANISM Filed Jan. 23, 1951 3 Sheets-Sheet 3 J/T/VEWTO -flZBf/FT/i 60/20 L Patented Nov; 3,7

"1 v "MASSACHUSETTS i i I v i ;THREAD= currme MECHANISM it either shuttle LY i p Accordinglyit is the ob ect of my 1nve n-,

7 Fig.3 is a KNOWLES' LOQM ,WORKS,g-OFvWORCESTEB, MASSACHUSETTS, A COBPQRATION OF AppHeation filedIJanuar-y 23,, 1e31. iserial'iuo. 510,740.

This invention relates to a mechanism for 7 cutting weft ends. extending from the selfvageofa piece ofclothfin a n'automatic loom.

f The invention relates' nore particularly to i fillingsmixing two -bytwo loom in which two shuttles iare p'icked alternately on successive picks, first tp one side of the loom and then to the other; and 'inifwhich the filling re plenislimentof both shuttlesftakes place at- 1 the same side of the loom; and preferably from one two-cellmagazinei -11; is desirable that the selv'agefthread cut- 7 ter operate to'cutthewe t ends'jof 'both the l ejected andthefreshly inserted weft car:

rier's vat a time whenthere is no chance of cutting the active weft thread extending to tion to provide a thread cuttings mechanism 29 at the cloth selvage, so designed and con- 1 nected that it will'become operative once (only in every four picks oithe loom, and that I it will thus becomeoperative on the pick when both shuttlesare atitheopp0site side of the loom-from the thread cutter. v h v a A further object of'the -invention is to attain the above outlined result by the use of afvery's'imple and entirely reliable mechanism.

"lVith these general obiects in view, inyin- Evention consists in certain arrangementsand combinations o'fgparts, which will be hereina'fter described and more particularly pointed out inthe appended claim i A preit'erred form of the invention is shown I in the drawings, inwhich I I V Fig. 1 is a plan viewsofparts ofsa loorn s embodying my improvements; 7 Fig; 2 is a sectional" end elevation, taken along the line 2-2in Fig. 1; r

' diagrammatic view to be del scribed Fig. 4 isa side elevationofa selvage thread p457 cutter; adapted foruse in connection with my invention; i j Fig. 5 is a plan view thereof; 7

Fi'g. 6 is a sidei'elevation of the thread cutteniooking. in the'direction ofjthe arrow Fig. 5; and:

.inember.

* ALIYIBEBEV'E. eqnnonyor woncnsrnn, misssAcnusnrrsjnssreuon T0 cno unronga 7 Referring to the drawings, I have shown portions of a two by-two fillin -mixing dropbox loom comprising aloom frame 10', a lay 11', drop boxes .12, and a two-cell filling-replenishing magazine M having an end holder 14. The lay 11 is oscillated in the usual inanner from a continuously rotated crank shaft 16 (Fig; 2) which is geared in one-to-two relation to the usualbottom or camshaft 1 8, this cam shaftv thus rotating at half the speed of the crankshaft. L

-A selvage thread'cutter T is mounted on the breast beam 20 fof the 'loom adjacent the edge or the clothG. The thread cutter itself is of the usual commercial type, and comprises a stand 22 inwhich a supporting bar 23 is slidably mounted whi'ch' bar isnormally pushed rearward by a compression spring 24,

"A'cutter bar 25 7) is providedwith hook-shaped cutting blades 26 and a depending contact portion 27. The cutter bar is slldable in guideways formed in the rear end portion of the head 30 of the supporting bar 23, andthe cutter blades 26 cooperate with a cutter blade 31 fixedto the head 30 when the depending portion 27 is engaged by a forwardl'y moving lay. i I

"A spring '32 is coiled'about a stud 33-0n the side'of the bar23, and the end of this spring 32 engages a stud 35 in theside of the depending portion 27 of the cutterbar. The

spring 32 normally holds thel cutters in the L rearward openposition indicated inFigQ 4. A latch 40 (Fig. 2) is pivoted at 41on the breast beam 20 and is normally held in posi- 'tiontoengage' the lower end of the cutter bar portion 27 by a tension spring 42. The

latch 40'is provided with a depending arm 44 to which the upper end, of a link 45; is connected. 4 At its lower end the link45-is provided with an end portion 46 having an elongated slot 47 formeditherein. crank pin48 is fixed in the sidegof a gear 49: and

extends into the slot 47. Thegear49 meshes with a pinion 50 on the cam shaft l 8 ',fthe gear" and pinionhaving a ratio of two-to-one; so

that the, gear 49 makes onerevolution for everyfour revolutions of the crank shaft 16;

. four beats ofthe lay 11. a

' "The 100m is provided with the usual clampin deViceGO' (Fig. 1) for holding the end of the" out going weft W, while the end holder 14 similarly holds the end of the incoming weft WV.

I andr hence' makes one revolution for every Having describedtheidetailsof construc- 'tion ofmy improved thread cutting mechanismfit Will'be evident that-the thread cutter" is'fhe'ld' in forward inoperative p081 tion by the latch 40, except when the crank pin 48 engages the upper end of the'slot 4L7 such 'res'tricted'operationwill be apparent 1 from referencetO Fig. 3,-,whichlillustrates diagrammatically themovements of the shuttles in a two-by -two, filling-mixingloomr 1 The drop boxes are indicatedat:12and12 at the two sides ofgtheloom,and the shuttles are marked by the letters 1 Ra s ind G, indicating red and green shuttles v It will be understood that both shuttles niay'carry the same kind of filling and that the designations R and G are;merelyfor the purposesof description. I The magazine-LI and the thread cutter'T are also indicated asbein'g located at theleft indicate the positions of the shuttlesand drop boxes'in successive picks. In the upper diagram, bothshuttlesrare at the' right hand or non rep-lenishing side of-the loom, with;thershuttle-.R about tobe picked. gTh'e second diagram-shows the red.

shuttle at the magazine endof thelo oin, and

. the green shuttle about to be picked ito'th-e magazine end. ;,The third diagra-rashowsb oth" shuttles; a-t. the magazine end, with the red shuttleaboutxtoreturn to the opposite end and the fourth diagramshows thered shuttle at the right hand side ofitheloom i J and the green. shuttle in 'tfligl-it: toward the right hand side. y I V It will be evident that 'after the movement of. the shuttlesfindicated in the fourth or y lower diagramythetwo drop boxes 12' at the magazine, and thread cutting side foflthe 100m will be vacanh-softhat there-will be no weft f'at the'" left hand sidefiextending from the selvage to eithfer active shuttle- The gear carrying the crank pin 48 FS- so me -119d h reference to the movements fourth pick onlybf the loom ,l I

' hand side of Figl 3, the dia-granis of which ofthe shuttles and dron boxes that the thread cutter T will be releasedas the shuttle G starts for the right .hahd'box. The thread cutter will then operateto out the Weft ends l/V and lVas the lay thereafter reaches front center and while the shuttles are both in the right, hand boxes 12. c y

The thread cutter-will then be held inoperative during the next three picks, representt ed' by the three upper diagrams in Fig; 3, and

will be again released as 'botlrshuttles are agaln boxed inthe right hand'bOXes IQ -s I am thus able to cut both the out-going and in-connng weft ends at a time when both ZlClJELCBIit shuttle'boxes are empty and when there is no i wefts.

limited to the details herein disclosed, otherwise than eXgressed in the claims but what'I claimi'sj l 1 1. lnra'weft replenishingloom, a s'elvage thread cutter, a'h'd means of said thread cutter on only of said loom I" U 2. lira weftreplenishing loom, a selvage thread cutter cperable byiengagementwith a forwardly moving lay,- means, to render said thread cutter inoperative and means to reievery fourth pick possibility ofcuttingthe active Havin thus described an invention and a the advanta es thereof IdQ notw 'sh tote to cause act-nation lease said thread cutterifor operation on every fourth pick ofthe loom.

' 3; In a filling-mixing,two-hytwo loci-aha selvage thread cutter operable by engagement with the forwardly moving lay, means to holdsaid threadcutter out of action, and

means to release'said thr ead cutter on every 4. In a-filling-n1i:iing,. two-bytwo loom, a selvage thread cutter operable-by engage ment with the forwardly mOVifigl'ltty, means to hold said threadcutterout of? action, and

meanstorelease said thread cutter-on every fourth pick only of the loom and when both shuttles are atthe opposite side of the loom from the thread cutter. y a T V 5. The combination in loom assetforth in Claim :4, inwhich",saidlattermeans includes a latch and an actuating member therefor, geared in fourownie ratio to the crank shaft of theloom.

In testimony whereof I'havehereunto :af-

fixed my signature.

u- ALBE g'r A. eonnonj 

